If the System Has Infinitely Many Solutions, Write the Solution $$\begin{array} { l } 10 x - y = 5 \\- 20 x + 2 y = - 10\end{array}$$

Multiple Choice

If the system has infinitely many solutions, write the solution set with x arbitrary.
- $$\begin{array} { l } 10 x - y = 5 \\- 20 x + 2 y = - 10\end{array}$$

A) $\{ ( x , 5 - 10 x ) \}$

B) $\varnothing$

C) $\{ ( x , 10 x - 5 ) \}$

D) $\{ ( x , 20 x - 5 ) \}$